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Paradyne PIXNET Communications Systems ANALYSIS

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Paradyne PIXNET Communications Systems ANALYSIS C13-679-101 Processors ( Paradyne PIXNET Communications Systems dalapro VENDOR: Paradyne Corporation. 8550 Ulmerton Road. Largo, Florida 33541. Telephone (813) ANALYSIS 530-2000. In Canada: Paradyne Canada Ltd .. 200 Consumers Road. Fifth Floor. North York. Ontario M2J 4R4. Telephone (416) 494-0453. UPDATE: Paradyne has enhanced its PIXNET line with MODEL(S): PIX; PIXNET; PIXNET/XL. the introduction of PIXNET/FJ(, a fiber optic channel ex­ FUNCTION: Supports high-speed applications tender that supports local control units located beyond the such as remote printing. check processing. CADI recommended channel distance via fiber optic cable. Also, CAM processing. and CPU-to-CPU data transfer. the PIXNET/XL system now supports 512 terminals. HOST COMPUTERS SUPPORTED: IBM and compatible mainframes. Paradyne, by reputation an innovator in processor and ARCHITECTURE SUPPORTED: Multiple proces­ modem technology, is a leading supplier of communica­ sor architecture using nodes. tions network equipment. Paradyne offers direct service OPERATING SOFTWARE: Depends upon the operations throughout the United States, Canada, the configuration. United Kingdom, Japan, and Germany. The company COMPETITION: Amdahl 4705E and 4705T. and IBM 3705 and 3725. PRICE: Prices range from $50.000 to $150.000. depending upon the configuration. REPORT HIGHLIGHTS PAGE SPECIFICATIONS ............................... 103 Configuration ............................. ..... 103 Software ........................ ................ 104 PRICING ............................................. 105 provides a broad range of data communications and net­ working products that includes modems, statistical multi­ plexers, Tl multiplexers, network management systems, and host channel extension products. Over the last few years, the company introduced a variety of new products including PIXNETIXL, an intelligent high-speed channel extension processor; PIXNET/FX, a fiber optic channel extender; 3450 and 3470 diagnostic modems, which operate at speeds from 14.4K bps to 19.2K bps; 3056 BSU, a combined DSUICSU for Digital Data Service up to 56K bps; FDX 2400, a 2400 bps full-duplex dial modem; and the 3230 T1 Nodal Processor for larger complex Tl networks. In addition, the company introduced Netcare, a customer service program provid­ ing technical and management services for data communi­ cation network daily operations. PIXNET is a networking control unit that allows local peripherals in remote locations to interact with one or more computers in a "local device" access method. This channel extension technique does not require front-end Paradyne's PIXNET/XL system can simultaneously attach to two separate hosts and support 512 terminals. DECEMBER 1988 COPYRIGHT © 1988 McGRAW-HILL, INCORPORATED. REPRODUCTION PROHIBITED DATA PRO RESEARCH, DELRAN.NJ 08075 USA C13-679-102 Processors Paradyne PIXNET Communications Systems processor hardware or software, nor does it require remote The communications links between the PIX/PIXNET host telecommunications software, such as VT AM or control units operate synchronously, half or full duplex, at BTAM_ speeds to 56K bps. The communications links between the PIXNET/XL nodes operate synchronously, full du­ PIXNET refers to an entire family of Paradyne products plex, at speeds up to l.544M bps. PIXNET/XL nodes designed to support a wide range of user requirements_ communicate by an exclusive technique called Multi-Link Communication link speeds from 4800 bps to 104M bytes Protocol (MLP), which utilizes multiple communications per second are available in point-to-point configurations_ circuits between nodes to attain a given bandwidth. For a Full networking functionality supports multiple hosts user who needs 112K bps of bandwidth, two circuits are and/or multiple users_ installed between PIXNET /XL nodes. If one of the cir­ cuits fails, the user loses only that portion of bandwidth. The PIXNET product family consists of the following Graceful degradation occurs, and total bandwidth restora­ products: tion occurs when the circuit comes back into service. Both RS-232 and V.35 interfaces are supported, as well as PIX A Local Control Unit (LCU), attaches to the byte twisted pair, Telco Tl Service, microwave, satellite, coax, multiplexer channel of an IBM or compatible mainframe and fiber optic. to provide host attachment. A Remote Control Unit (RCU) provides the peripheral device interfaces required to support a wide range of local devices. PIX supports MARKET POSITION point-to-point configurations at speeds from 4800 bps to 56K bps. The Paradyne PIXNET /XL systems perform VT AM-like functions without front-end processor expansion or multi­ PIXNET: A Master Network Control Unit (MNCU), pro­ system networking software. Competitive communica­ vides both application and CPU switching functions for tions processors that perform similar functions with networking requirements. The MNCU supplies ports to appropriate software include the IBM 37X5 and the Am­ communicate with either additional Network Control dahl 47X5 products. Units (NCUs) or PIX Control Units. The MNCU serves as network monitor, connecting various devices to the IBM's 3737 announcement in June 1987 further validated requested host and application, and monitors the configu­ the channel extension technology developed by Paradyne. ration file. The IBM 3737, a wide area channel extender, provides host-to-host communications. PIXNET /XL supports not PIXNET/XL: A PIXNET/XL system can simultaneously only VTAM-CTC, but native JES2, JES3, and RSCS as attach to two separate hosts (byte or block multiplexer well. For communications between hosts in different SNA channels) and support 512 terminals and high-speed de­ networks, Paradyne's software, XL/XPRESS, provides bi­ vices such as Xerox 9700 and IBM 3800 laser printers. In directional data transfer at speeds above those of front­ addition, high-speed host-to-host communications can be end processors. accomplished via PIXNET/XL and IBM's CTCA without concern for IBM's normal distance limitation. A PIXNET /XL unit supports a T1 communications link, PRODUcr EVALUATION eight 56K bps links, or sixteen RS-232 links, grouped together and appearing logically as a single communica­ Paradyne's PIXNET/XL system offers one major advan­ tions facility. Each microprocessor-based PIXNET/XL tage: VTAM-like switching functions, enabling users to control unit can have 4 million bytes of global memory. switch from one application to another without the ex­ PIXNET/XL Networking, a function of the nodal soft­ pense and complexity of adding VT AM, TCAM, or ware, allows both application switching and CPU switch­ BT AM software to the host. In addition, NCP is not ing functions among nodes. This allows a single, remote required in the front end, therefore eliminating the need printer to receive data from multiple hosts, or central for additional front-end processors, equipped with NCP terminals to switch sessions between hosts in various lo­ software, to support remote terminals. Unlike traditional cations. front-end processors, PIXNET/OCL supports high-speed laser printers, item processors, tape drives, card readers, PIXNET/FX A PIXNET/FX fiber optic channel extender and punches. lengthens the IBM (plug compatible) byte or block multi­ plexer channel to 1.24 miles (2 kilometers) via fiber optic The PIX and PIXNET systems use Paradyne's version of cable. It maintains Paradyne's tradition of host IBM's Synchronous Data Link Control (SDLC) protocol. transparency-no software or hardware modifications­ Data compression/compaction techniques enhance high­ while providing transmission speeds up to 104M bps. speed line efficiency; built-in error control and recovery PIXNET /FX supports the same channel-attached devices procedures are standard. as PIXNET/XL. COPYRIGHT © 1988 McGRAW-HILL, INCORPORATED. REPRODUCTION PROHIBITED DECEMBER 1988 DATAPRO RESEARCH, DELRAN NJ 08075 USA C13-679-103 Processors Paradyne PIXNET Communications Systems ( PIXNET/XL utilizes an X.25-like HDLC communication Transparency enhances the PIXNET/XL advantage. Its method between nodes. This bit-oriented, full-duplex pro­ communications functions are transparent to both the tocol packages data into packets for transmission to other user and the host(s); the system sees various peripherals as nodes. Packet sizes vary from 512 to 4K bytes depending local devices, addresses them individually, and achieves on devices supported and throughput requirements. The virtual simultaneous operation. frame control procedures reflect the CCITT X.25 LAPB standard. Multi-Link Protocol (MLP) software allows The PIXNET RCU replaces an IBM-compatible device PIXNET/XL to utilize 16 communications lines as one controller (e.g., an IBM 3274 terminal controller) when transmission group. Sixteen lines or T1 ports may be Paradyne peripherals and CRTs are used. PIXNET sys­ connected in parallel. If a link fails, traffic is automatically tem users must configure all applicable device controllers, retransmitted using other available links until the problem used in a traditional IBM environment, when non­ link becomes operational. Paradyne devices are required. SPECIFICA TIONS DATE OF ANNOUNCEMENT: PIX-March 1976 (as laser printers, magnetic tape units, and clustered CRTs/ PIX I); PIXNET-fourth-quarter 1979; PIXNET / printers emulating 3270s. Paradyne's own line of periph­ XL-December 1984; PIXNET/FX-November 1987. erals or IBM peripherals (or compatibles) can be used. DATE OF FIRST DELIVERY: PIX-April 1976 (as PIX I); PIXNET-February
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